<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>判断一个数是不是完美数</title>
</head>
<body>
    <script>
        function perfect(n) {
            var sum = 0;
            for(var i = 1 ; i < n ; i++) {
                if (n % i === 0) {
                    sum+=i;
                }
            }
            if (sum === n) {
                console.log(`${n}是完美数`)
            } else {
                console.log(`${n}不是完美数`)
            }
        }
        perfect(7)
        perfect(6)
    </script>
</body>
</html>